Updated project directories for unified 'systemUI' folder (#5034)

systemUI/anim/src/com/android/systemui/surfaceeffects/loadingeffect/LoadingEffectView.kt

@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.surfaceeffects.loadingeffect
+
+import android.content.Context
+import android.graphics.BlendMode
+import android.graphics.Canvas
+import android.graphics.Paint
+import android.util.AttributeSet
+import android.view.View
+
+/** Custom View for drawing the [LoadingEffect] with [Canvas.drawPaint]. */
+open class LoadingEffectView(context: Context?, attrs: AttributeSet?) : View(context, attrs) {
+
+    private var paint: Paint? = null
+    private var blendMode: BlendMode = BlendMode.SRC_OVER
+
+    override fun onDraw(canvas: Canvas) {
+        if (!canvas.isHardwareAccelerated) {
+            return
+        }
+        paint?.let { canvas.drawPaint(it) }
+    }
+
+    /** Designed to be called on [LoadingEffect.PaintDrawCallback.onDraw]. */
+    fun draw(paint: Paint) {
+        this.paint = paint
+        this.paint!!.blendMode = blendMode
+
+        invalidate()
+    }
+
+    /** Sets the blend mode of the [Paint]. */
+    fun setBlendMode(blendMode: BlendMode) {
+        this.blendMode = blendMode
+    }
+}